English verb conjugation
MUST CONCUSS

Regular verb: concuss - concussed - concussed

Affirmation

Simple form	V-ing form
I must concuss you must concuss he must concuss we must concuss you must concuss they must concuss	I must be concussing you must be concussing he must be concussing we must be concussing you must be concussing they must be concussing
Perfect	V-ing perfect
I must have concussed you must have concussed he must have concussed we must have concussed you must have concussed they must have concussed	I must have been concussing you must have been concussing he must have been concussing we must have been concussing you must have been concussing they must have been concussing

Negation

Simple form	V-ing form
I must not concuss you must not concuss he must not concuss we must not concuss you must not concuss they must not concuss	I must not be concussing you must not be concussing he must not be concussing we must not be concussing you must not be concussing they must not be concussing
Perfect	V-ing perfect
I must not have concussed you must not have concussed he must not have concussed we must not have concussed you must not have concussed they must not have concussed	I must not have been concussing you must not have been concussing he must not have been concussing we must not have been concussing you must not have been concussing they must not have been concussing

Interrogative form

Simple form	V-ing form
must I concuss? must you concuss? must he concuss? must we concuss? must you concuss? must they concuss?	must I be concussing? must you be concussing? must he be concussing? must we be concussing? must you be concussing? must they be concussing?
Perfect	V-ing perfect
must I have concussed? must you have concussed? must he have concussed? must we have concussed? must you have concussed? must they have concussed?	must I have been concussing? must you have been concussing? must he have been concussing? must we have been concussing? must you have been concussing? must they have been concussing?

Interro-negative form

Simple form	V-ing form
must I not concuss? must you not concuss? must he not concuss? must we not concuss? must you not concuss? must they not concuss?	must I not be concussing? must you not be concussing? must he not be concussing? must we not be concussing? must you not be concussing? must they not be concussing?
Perfect	V-ing perfect
must I not have concussed? must you not have concussed? must he not have concussed? must we not have concussed? must you not have concussed? must they not have concussed?	must I not have been concussing? must you not have been concussing? must he not have been concussing? must we not have been concussing? must you not have been concussing? must they not have been concussing?